Further evidence of permanent behavioural changes in rats treated neonatally with neurodrugs.

Pargyline or reserpine treatment of male rats during the first two weeks of life resulted in significantly increased exploratory activity (sniffing) associated with a significantly decreased emotional reactivity (defecation rate) in adult life. These findings suggest that nonphysiological concentrations and/or turnover rates of neurotransmitters during brain differentiation apparently produced by neurodrugs can lead to permanent behavioural changes.